package net.lzzy.practices.web.course;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import net.lzzy.practices.constants.ApiConstants;
import net.lzzy.practices.constants.Messages;
import net.lzzy.practices.entities.Course;
import net.lzzy.practices.entities.User;
import net.lzzy.practices.services.CourseService;
import net.lzzy.practices.services.UserService;
import net.lzzy.practices.utils.StringUtils;
import net.lzzy.practices.web.models.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

/**
 * @author liaodcc on 2022/5/20 8:19.
 */

@Api(tags = "课程相关业务")
@CrossOrigin
@RestController
@RequestMapping(ApiConstants.ROUTE_COURSE_ROOT)
public class CourseApiController {
    private final CourseService service;
    private final UserService uService;

    @Autowired
    public CourseApiController(CourseService service, UserService uService) {
        this.service = service;
        this.uService = uService;
    }
    @GetMapping(ApiConstants.ROUTE_COURSE_ALL)
    @ApiOperation(value = "获取所有课程",notes = "<b>参数包括：</b><br/>&nbsp;&nbsp;&nbsp;&nbsp;token(String)<br/>")
    public ApiResult getCourses(@RequestParam String token){
        List<VmCourse>courses = new ArrayList<>();
        service.get().forEach(course -> courses.add(VmCourse.create(course,false)));
        return new ApiResult(true,courses.size() +"",courses);
    }
    @GetMapping(ApiConstants.ROUTE_COURSE_OPEN)
    @ApiOperation(value = "获取所有开放课程",notes = "<b>参数包括：</b><br/>&nbsp;&nbsp;&nbsp;&nbsp;token(String)<br/>")
    public ApiResult getOpenCourses(@RequestParam String token){
        List<VmCourse> courses = new ArrayList<>();
        service.get(true).forEach(course -> courses.add(VmCourse.create(course,false)));
        return new ApiResult(true,courses.size() +"",courses);
    }
    @GetMapping(ApiConstants.ROUTE_COURSE_PAGE)
    @ApiOperation(value = "分页获取所有课程",notes = "1.token(String)<br/>2.page(int)<br/>3.size(int)<br/>")
    public ApiResult getPagedCourses(@RequestParam int page,@RequestParam String token,@RequestParam int size){
        List<VmCourse> courses = new ArrayList<>();
        service.get(page, size).forEach(course -> courses.add(VmCourse.create(course,false)));
        return new ApiResult(true,service.count() + "",courses);
    }
   @GetMapping(ApiConstants.ROUTE_COURSE_OPEN_PAGE)
   @ApiOperation(value = "分页获取所有开放课程",notes = "1.token(String)<br/>2.page(int)<br/>3.size(int)<br/>")
    public ApiResult getPagedOpenCourses(@RequestParam String token,@RequestParam int page,@RequestParam int size){
       List<VmCourse> courses = new ArrayList<>();
       service.get(page,size,true).forEach(course -> courses.add(VmCourse.create(course,false)));
       return new ApiResult(true,service.count() + "",courses);
   }

   @GetMapping(ApiConstants.ROUTE_COURSE_TEACHER)
   @ApiOperation(value = "获取某一教师所有课程",notes = "<b>参数包括：</b><br/>&nbsp;&nbsp;&nbsp;&nbsp;1.token(String)<br/>2.id(UUID)<br/>")
   public ApiResult getTeachersCourses(@RequestParam String token,@RequestParam(name = "id")UUID teacherId){
       List<VmCourse> courses = new ArrayList<>();
       service.getTeachersCourses(teacherId).forEach(course -> courses.add(VmCourse.create(course,true)));
       return new ApiResult(true,courses.size() + "",courses);
   }

    @GetMapping(ApiConstants.ROUTE_COURSE_STUDENT)
    @ApiOperation(value = "获取某一教学生所有课程",notes = "1.token(String)<br/>2.id(UUID)<br/>")
    public ApiResult getStudentCourses(@RequestParam String token,@RequestParam(name = "id")UUID studentId){
        List<VmCourse> courses = new ArrayList<>();
        service.getStudentsCourses(studentId).forEach(course -> courses.add(VmCourse.create(course,true)));
        return new ApiResult(true,courses.size() + "",courses);
    }
    @PostMapping(value = ApiConstants.ROUTE_COURSE_ADD,produces = "application/json",consumes = "application/json")
    @ApiOperation(value = "添加课程",notes = "1.token(String)<br/>2.name(String)<br/>3.desc(String)<br/>"+
            "4.cover(int)<br/>5.tId(String)<br/>6.open(boolean)<br/>")
    public ApiResult add(@RequestParam CourseInfo info){
       return addOrUpdate(null,info);
    }

    private ApiResult addOrUpdate(UUID id,CourseInfo info){
        String token = info.getToken();
        String name = info.getName();
        String desc = info.getDesc();
        String cover = info.getCover();
        String teacherId = info.getTid();
        boolean open = info.isOpen();
        if (StringUtils.isEmpty(name) ||
                StringUtils.isEmpty(token) ||
                StringUtils.isEmpty(desc) ||
                StringUtils.isEmpty(cover) ||
                StringUtils.isEmpty(teacherId)){
            return new ApiResult(false, Messages.INCOMPLETE_INFO.toString(),null);
        }
        User teacher = uService.getById(UUID.fromString(teacherId));
        if (teacher == null){
            return new ApiResult(false,Messages.WRONG_ID.toString(), null);
        }
        Course course;
        boolean create = id == null;
        if(create) {
            course = new Course();
            course.setTeacher(teacher);
        }else {
            course = service.getById(id);
            if (course == null){
                return new ApiResult(false,Messages.WRONG_ID.toString(), null);
            }
        }
        course.setOpen(open);
        course.setCover(cover);
        course.setName(name);
        course.setDescription(desc);
        if (create){
            return new ApiResult(true,"添加成功",VmCourse.create(service.add(course),true));
        }else {
            Course updated = service.update(course,token);
            if (updated == null){
                return new ApiResult(false,Messages.WRONG_ID.toString(), null);
            }
            return new ApiResult(true,"更新成功",VmCourse.create(updated,true));
        }
    }

    @PostMapping(ApiConstants.ROUTE_COURSE_UPDATE)
    @ApiOperation(value = "更新课程",notes = "1.token(String)<br/>")
    public ApiResult update(@PathVariable UUID id,@RequestBody CourseInfo info){
       return addOrUpdate(id, info);
    }

    @PostMapping(ApiConstants.ROUTE_COURSE_OPEN_CLOSE)
    @ApiOperation(value = "开放、关闭课程",notes = "1.token(String)<br/>2.courseId(String)<br/>3.open(boolean)<br/>")
    public ApiResult openCloseCourse(@RequestBody CourseOpenInfo info){
        String strCourseId = info.getCourseId();
        String token = info.getToken();
        boolean open = info.isOpen();
        if (StringUtils.isEmpty(strCourseId)  ||  StringUtils.isEmpty(token)){
            return new ApiResult(false,Messages.INCOMPLETE_INFO.toString(), null);
        }
        Course course = service.openCloseCourse(UUID.fromString(strCourseId),open,token);
        if (course == null){
            return new ApiResult(false,Messages.WRONG_ID.toString(), null);
        }
        return new ApiResult(true,Messages.SUCCESS.toString(),VmCourse.create(course,true));
    }

    @DeleteMapping(ApiConstants.ROUTE_COURSE_REMOVE)
    @ApiOperation(value = "删除课程",notes = "1.token(String)<br/>2.courseId(String)<br/>")
    public ApiResult delete(@RequestBody CourseKeyInfo info){
        String strCourseId = info.getCourseId();
        String token = info.getToken();
        if (StringUtils.isEmpty(strCourseId) ||  StringUtils.isEmpty(token)) {
            return new ApiResult(false,Messages.INCOMPLETE_INFO.toString(), null);
        }
        Messages msg = service.remove(UUID.fromString(strCourseId),token);
        return new ApiResult(msg == Messages.SUCCESS, msg.toString(), null);
    }
}
